Tube-drawing apparatus.



P.H. FRIEI., DECD.

II. D. FRIEL. ADMINIsIII/Imx.

TUBE DRAWING APPARATUS.

APPLICATION FILED AUG. 28, Isle. IIEIIEwED MAY I5. 1919.

Patented Nov. 11, 1919.

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P. H. FRIEL, DECD.

H. n. FRIEL, AnMmlsTRATRIx.

TUBE DRAWING APPARATUS.

APPLICATION FILED AUG. 28. 191e. RENEwED MAY 15.19r9.

1,321,729-, Patented Nov. 11, 1912).

4 SHEETS-SHEET l2.

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P. H. Fmi-1L, DECD.

H. D. FRIEL. ADMINISTRATRIX.

TUBE DRAWING APPARATUS.

APPLICATION FILED AUG-28,19%. RENEWED MAY 15|I9I9.

Patented Nov. 11, 1919.

4 SHEETS-SHEET 3.

P. H. FRIEL. DEC'D.

H. D. rum. ADMINISTRATRIX.

TUBE DRAWING APPARATUS.

APPLICATION FILED Aue. 28, 1916. RENEwED MAY 15. |919.

1,321,729. Patented Nov. 11, 1919.

` '4 SHEETS-SHEET 4.

@ i f @imma-f ED sTATEs PATENT OFFICE.

PATRIOK H. FRIEI, F KEN OSHA, WISCONSIN; I-IATTIE D. FRIEL, ADMINISTRATRIX 0F SID PATRICK H. FRIEL, DEGEASEID, ASSIGNOR T0 SIMMONS -OOIlLIPAINlY, 0F KENOSHA, WISCONSIN, A. CORPORATION 0F DELAWARE.

TUBE-DRAWING APPARATUS.

racines.

Specioation of Letters Patent.

Patented N ov. 11, 1919.

application med August as, 191e, semi No. 117,386. Renewed my 15, 1919. serial No. 297,437.

To all whom t may concern:

a citizen of the United States, residing atl Kenosha, in the county of Kenosha and State of Wisconsin, have invented a certain new and useful Improvement in TubeDraw in Apparatus, of which the following is a f l, clear concise, and exact description, reference being. had to the accompanying drawings, vforming a part of this specification.

This invention relates to mechanism for drawing articles, such for ins-tanceas hollow tubing, from a source of materials and a machine, forming no part of Jthis invention, initially formingv the article to be drawn. The object of the invention is to provide an apparatus for taking hold of the tube or other similar article as it leaves the above mentioned manufacturing machine, and securely grippin it so that it can be drawn out in the ordinary manner'into the tube or other desired finished article.

The invention consists in a device of relatively few parts; which can easily and cheaply made; which is simple in operation, and not liable to get out of order; adapted to successively grip successive parts of the drawn tube or other article whereby such tube may 'be drawn continuously to any length from the manufacturing machine and under a substantially uniform tension at all times, thus insuring a good finished product.'

More particularly the invention consists in many features and details of construction which will be hereafter more fully set forth in the speciycation and claims.`

Referring to the drawings, in which similar numerals indicate the same parts throughout the several views,

Figure l is a side elevation partially 1n section of mechanism illustrating this invention in its preferred form,'in the act of drawing a tube. 4 Fig, 2 is a plan' view? of the mechanism shown in Fig. l, the tube being omitted to facilitate illustration.

- Fig. 3 is an enlarged sectional `detail endv view on the irregular line 3-3 of Fig. 2.

Fig. 4 is a central enlar ed View taken on the line df-t of Fig. 3, an on the line 4--4 of Fig.' 5.

Fig. 5 is a sectional end view on the line 5 5 of Fig. 4, showing the tube gripping jaws closed.

Fig. 6 is a changed osition view of the parts shown in Fig. 5, s owing the gripping Jaws open.

Fig. 7 is a perspective View of a gripping ujaw, and its spring removed from other parts.

Fig. 8 is a perspective View of a removable lining for a gripping jaw adapted to be inserted in the device of Fig. 7 to enable it to handle a tube of a smaller size.

Fig. 9 is a perspective view of certain `parts of the drive chain showing particularly the construction of link designed to facilitate positive driving of the gripping Jaws. Fig. 10 is a section on line 10-10 o Fi". 1. v

A he preferred form of machine illustrated inthe drawings is supported uponupri ht standards 2() spaced apart by any suita le rigid members not interfering with the operative parts of the machine, and particularly by the channel irons 22 spaced apart as shown in Fig. 3 to receive the specially formed U-shaped girder 24 havin in its upper surface a track 26 within w ich the.-

enlarged primary link ends 28 of the primary chain links 30 slide. Journaled in the .end standards 20, heretofore described, are

`track 26 when the machine is viewed in Fig. 1.

The chain is made up of pairs of primary links 30, heretofore described, placed side by side and provided with suitable pivot pins 38 ini their opposite ends in the ordinary manner. Between each successi-ve pair of primary links and journaled on such pivot pins 38 is an intermediate link 40, shown in great detail in Fig. 9.

Each of these intermediate links 40 is in its lower half of ordinary construction.l

The upper half of each such intermediate 'link is preferably socially tanned .as shown in Fig. 9 so as to provide two upwardly ris-w 'marked' respectively 48 and 50 through which the hinge pin 52 of the i pin jaws, to be hereafterdescribed, mjip ass? The block or lug 46 is substantially higher than is required merely to provide sufficient bearing for such hinge pin, thus providing a bearing surface 54 of substantial size agalnst which the gripping jaws or parts thereof may take bearing and be supported when the fully equipped chain is moved to the ri ht, as viewed in Fig. 9.

ivoted on the hinge in 52, which, as above indicated, is inserte through the parts 44 and 46 of each link 40, and between such blocks 44 and 46 are a pairof hinge arms 56 terminating at their outer ends in clamping jaws 60, clearly shown in perspective in Fig. 7. The hin e pins 52 are disposed lengthwise of the c ain whereby the jaws swing transversely to the plane orline of travel of the chain and about a common center or axis of swinging movement. Each pair of clamping jaws 60 preferably interit together, as is clearly shown in Fig. 5, and each such jaw 60 is recessed in the semicircular line 62 whose center of curvature is at 64. The. center of curvaturel just described lies in the plane'of contact 66 between the adjacent jaws 60, which plane also includesthe center of pi'vot pin 52, heretofore described, the result being that when a tube or other article to be worked upon is pla'ced in position, shown in Figs. 5 and 6, the jaws 60 may be freely moved backward and forward between the positions in which they appear in Figs. 5 and 6 without, inl

any position, interfering with the tube or havin their movement interfered with by the tu e.

In order to enable the machineto take care of and handle tubes or other articles of different sizes, the jaws 60 ma be provided with a series. of 4 removab e linings 72 having curved interior faces ,62a designed. to fit the varied product, such, linings be-4 ing s ecurable in position by any suitable tubes, the jaws or blocks 60 will 'be used' means, as for instance a curved band 747 adapted to fit into a circumferential recess 76 in the surface 62 of a clamping jaw, and be secured in position by any suitable means,

such for instance as a screw-threaded stud 78 passing through a hole 80 in the block 60, and permanently attached by a suitable nut 82. When it is desired to draw large without any such lining members 72. When it is idesired to draw smaller tubes, lining mem ers 72, one for each jaw 60, provided with the desired curved openings 62, will be detachably secured in position, as just described.

' Ihe jaws 60 are preferably urged from' rying the position of Fig. 5 toward the open position of Fig. 6 by a spring 84 of any suitable construction, located at any convenient point.

In order to insure positive opening of the jaws 60 at the proper p oint 1n the travel of the chain bearing all the parts just described, a" triangular curved separator 86 may be, if desired, secured inposition as shown in several of the figures, having inclined cam surfaces 87 terminating 1n a point 88 adapted to engage the sides 89 of a suitably formed recess 90 formed in the central top portion of each clamping jaw 60. In the particular machine here illustrated, the separator 86 is secured in position by the bolt 92 -'passing through a fixed part of the machine 93.

Cut transversel of the machine in member 24 are'- suita ly placed and 'arranged dove-tail slots 94 within 'which slide dovetail members 9 5 depending from the long horizontal lates 96 carryln yokes 97 in which are journaled a plura ity of rollers 98. Rigidly attached to member 24 are parallel bars 99 in which are placed screws 100 adapted to adjustably bear upon the yokes 97 and thusl force the-rollers 98 inward toward thel center of the machine, and against the outer vertical faces 101 of the gripping jaws 60, heretofore described. By adjustingV the screws 100 in and out the pressure ofthe rollers 98 on the jaws 60 may .be varied.

In the particular machine here illustrated, the shaft 33 is driven by any suitable power attached to a pulley -104 on a shaft 105 cara pinion 106 meshing with 'a gear 108 on s aft 33. An other suitable means for drivin this sha may be applied without departing from this invention.

At the left hand or entrance end ofthe machine, as illustrated in the drawings, are placed two converging cam tracks 110 between which'theV gripping jaws 60 pass before entering the space between the rollers 98 for the purpose of closing the gripping jaws upon the tube 70 preparatory to the jaws being rigidly compressed by the rollers 98 on the tube, thus insuring their taking hold of the tube for the purpose of drawing, as will more fully appear hereafter.

' Operation.

ping jaws 60`i question pass between rollers 98 and travel between them through the machine until after leaving the last pair of rollers 98, they engage the point 88 of the triangular cam member 86, which, as heretofore described, separates the jaws 60 notwithstanding any friction which may prevent spring 84 from separating them, as it should, whereupon such open pair of jaws pass down wheel 34 -at the right hand endl lupon the end of the tube. The tube is now moved by hand in this position to the right into the machine until the first pair of rollers, and possibly the second pair, have gripped the jaws 60, whereupon the power in the chain device is suiiicient to draw the tube through the machine just as long as there is any tube to be drawn furnished b the manufacturing machine (not showniI placed atthe left of the machine of this invention. i

Special attention is called to the fact that in the preferred machine of this invention, the gripping jaws are fastened to the chain drive and are hinged thereto in such a wa that they may be moved into and out of difSi ferent relations with reference to the tube or otherproduct to be worked upon without interfering therewith, thus greatly reducing the number of parts heretofore required in I devices of this class. Furthermore, the gripping jaws open automatically under spring action which is rendered positive by the use of the cam device 86, and the pressure of the gripping jaws is adjustable through the use of the adjusting screws 100. 4

Owing to the fact that the series of rollers 98 through which the gripping jaws 60 pass l is of considerable length and 1s nevertheless in rigid alinement, the device serves the useful function 0f practically straightening slightly bent tubes passed through the device. By attaching the gripping mechanism, practically directly to the power driven chain a very positive and efficient operation is obtained.

If it be desired to have this machine weld the adjacent edges 120 of a lock joint tube, such as is shown in Fig. 5 or a butt joined tube, the machine may be designedl with a suitable opening between the lines of contact of the jaws 60 for the insertion of the flame from a brazing or weldin-gtorch with out departing from this invention.

Having thus described my invention, what I claim as new and' desire to secure by Letters Patent, is:

1. In a machine of the class described,.a drive chain comprising pairs of primary links .connected` to intermediate links, pivotal means carried on an intermediate link and extending lengthwise of the chain, and a pair of jaws pivoted upon said pivotal means adapted to swing toward each other to clamp the part to be drawn.

2. In a machine of the class described, a drive chain comprising pairs of primary links connected to intermediate links, pivotal means carried on an intermediate link and extending lengthwise of the chain, a pair of jaws pivoted upon said ivotal means ada ted to swing toward eac other to clamp t e part to be drawn and a block upon said intermediate link adjacent to the pivotal mechanism of said clamping jaws adapted to receive and support the clamping jaws and the bearings therefor, for the purposes set forth.

3. As an article of manufacture for use in mechanism of the class described, a chain link 40 having near its ends space for pivot pins, and havlng extending from one side blodks 44 and 46 perforated to receive the pivot pins of a hln'ge, the block 46 being relatively large so as to receive and support the parts of a hinge device mounted upon such a pivot pin.

In witness whereof I hereunto subscribe my name this 23rd day of August A. D., 1916.

PATRICK H. FRIEL.

Witnesses:

DWIGHT B. CHEEVER, M. S. RosENzWEIG. 

